Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:31:19 2012 Optimize a model with 161 rows, 396 columns and 396 nonzeros Model has 320 quadratic constraints Presolve removed 0 rows and 2 columns Presolve time: 1.89s Presolved: 161 rows, 394 columns, 394 nonzeros Variable types: 320 continuous, 74 integer (73 binary) Root relaxation: objective 0.000000e+00, 36 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 83.0000000 - - - 1s 0 0 0.00000 0 26 83.00000 0.00000 100% - 1s 0 0 0.00000 0 39 83.00000 0.00000 100% - 1s 0 0 0.00000 0 31 83.00000 0.00000 100% - 1s 0 2 0.00000 0 31 83.00000 0.00000 100% - 1s H 52 52 44.0000000 2.89474 93.4% 26.3 1s * 52 52 34 41.0000000 2.89474 92.9% 26.7 1s * 55 49 33 40.0000000 2.89474 92.8% 26.1 1s H 93 76 37.0000000 2.94915 92.0% 24.2 2s * 188 147 25 36.0000000 6.85747 81.0% 29.1 2s * 284 198 20 35.0000000 7.07576 79.8% 28.1 2s * 290 180 19 34.0000000 7.07576 79.2% 27.7 2s 2347 835 23.35232 33 238 34.00000 17.93333 47.3% 24.4 5s * 2808 955 54 33.0000000 18.85714 42.9% 23.1 5s * 3286 979 46 32.0000000 19.96000 37.6% 22.6 5s H 3530 897 31.0000000 20.44389 34.1% 22.3 6s 5105 979 29.86441 48 220 31.00000 23.11111 25.4% 21.1 10s 8543 312 29.08781 36 215 31.00000 28.00000 9.68% 19.9 15s Explored 8992 nodes (174994 simplex iterations) in 15.26 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%